My samsung dlp hl-p4663w tv makes a screeching sound when turning it on then the picture fades. It sounds like a fan problem and when you turn it off it continues to screech like a fan but when it stops screeching the lamp cooling lamps still spin for about a minute. I pulled the lamp and cleaned the dust off of the 2 fans I could reach from that point but I am still getting the screech sound intermitantly. What do you think is the problem?

SOURCE: Samsung Dlp HL-R7178w not turning On.

If all 3 leds blink, it can be the lamp, ballast (lamp driver), color wheel, or dmd board (all are engine parts = engine failur). its usually the lamp, but you can listen to troubleshoot. when it turns on, you will hear the fans come up (humm..airflow noise), then you will hear the colorwheel (high pitched squeel.. it will come up to speed) and then the ballast will fire up the lamp.. if the lamp doesn't fire, you will hear the spark gap fire (a 1 second buzz noise indicating bad lamp).. the gap will fire 3 times, they tv will then retry again and again until it shuts off and kicks out the error. this power up path will help you listen to find your problem. i can assist further.

SOURCE: Color is wrong after color wheel replacement

I am not sure about your model but i do know on some samsung dlps there is a dip switch that has to be changed if you have the backwards color after changing the color wheel.I hope this helps.

Chris

SOURCE: My RCA is screeching

To install the color wheel, turn off and unplug the tv, take off the lower back casing (17 star type screws), remove the lamp door, remove the lower back casing. Look just left of the lamp you will see 3 smaller star type screws near a small circuit board (which is on the color wheel), remove those screws unplug cable from color wheel, unplug other end of 2nd cable from tv circuit board (just to the upper left nearest to the color wheel.

All you have to do is install the color wheel, plug in both cables, put the back on and place the lamp door back in its position, the lamp door pushes in a lillte blue lever which allows the lamp bulb to light up.

I'm in the process of doing the same myself on my RCA same model. Where did you buy the color wheel from?

rw9704

SOURCE: Samsung DLP HL-P4663W - loud whistling noise while the TV is on

That most probably seems to be a future issue with your color wheel, it's starting to go out, you need to identify which one you have before you purchase one, there are two kinds, one with a gold bearing and another one with a silver bearing

Sonny Berry

• 8617 Answers
• Posted on Dec 24, 2009

SOURCE: Obtain repair manual for Samsung DLP projection TV's.

You can get the service manual by download link within minutes from the following link. Just scroll down the page and you will see your model listed.
http://www.tvrepairworld.com/service_manuals

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